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Why Does My Dog Throw Up After Eating? 9 Vet-Reviewed Causes

a border collie dog looking sick covered with blanket on couch

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Reviewed & Fact-Checked By

Dr. Nia Perkins

Veterinarian, DVM

The information is current and up-to-date in accordance with the latest veterinarian research.

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It’s mealtime, and your dog excitedly runs to his bowl. He devours his food and then, a few minutes later, you hear the all-too-familiar sound of him throwing up and the telltale splash that indicates he’s finished the job.

How often does this happen in your home? If your dog is throwing up often after eating, you’re probably concerned and curious about what could be causing this behavior. Several things could be to blame for your dog’s post-meal emesis.

Keep reading to find nine potential reasons your dog is throwing up after eating.


The 9 Reasons Why Your Dog Throws Up After Eating

1. You’re Transitioning Him to a New Dog Food

If you’ve recently changed up his food, he might be dealing with gastrointestinal upset as a result. This is especially true if you transitioned him to this new food too fast. It should take 7 to 10 days to fully transition a pet to a new diet. If you do it too quickly, his stomach could become upset, and that’s when he would start throwing up after his meals. By transitioning him slowly, you can see how his body reacts to the new food and if it agrees with his stomach.

french bulldog eating food from bowl
Image Credit: Tienuskin, Shutterstock

2. He Ate or Drank Too Much

Just like when we eat or drink too much, dogs, too, can throw up after big meals. Some dogs are very food-motivated and get very excited about mealtime. They might inhale their food within minutes or may even swallow it whole without chewing it. There’s only so much room in your dog’s stomach, and if it fills up too fast, your pup could wind up throwing everything back up.

If you know that your dog likes to eat more than they should at one time, you can try buying a slow feeder bowl to get him to eat slower.

3. He Ate or Drank Too Fast

A telltale sign that your dog has eaten or drank too fast is when he throws up near his food bowl, and it looks like it has food in it with liquid.

This is a common problem in multi-dog households when one dog eats his own food and then moves to his brothers’ and sisters’ bowls also to eat theirs. If this is the case, you might consider feeding your dogs in separate rooms so they can take their time eating their meals.

dog eating from bowl in kitchen
Image Credit: Pixel-Shot, Shutterstock

4. He Ate Something He Shouldn’t Have

Every pet owner has, at some point in time, said the words, “What are you eating?” as they frantically run over to their pet to see what they have in their mouth. It could be that your dog is throwing up after eating because he’s eaten something he shouldn’t have.

Some dogs have a disordered eating habit called pica, where they eat items that aren’t food. Some dogs will eat wood, plastic, or even rocks. Others will develop coprophagia, a condition where they’ll eat feces. This is more common in puppies, but it can carry over into adulthood if it’s not treated when they’re puppies.

Sometimes dogs can get into trouble in their own backyard and house. If he eats a plant or flower that is toxic, he might start vomiting to rid his body of the toxins. Here’s a great comprehensive list of poisonous plants for dogs that you should read through to ensure your plants and trees aren’t accidentally hurting your pooch.

When your dog eats something inedible, his body is unable to break down the item in his digestive tract. His stomach muscles will start to contract to expel the foreign body from his cycle via vomiting.

5. He Ate Grass

Dogs sometimes eat grass when they’re out playing in the yard. Eating grass is another form of pica and can often cause vomiting. Dogs will eat grass for a wide variety of reasons. Some might gnaw on the greenery to make themselves vomit if they’re not feeling well. Others might eat grass to improve their digestion, treat their intestinal worms, or in an attempt to fulfill a nutritional need they’re not meeting.

Dog eating grass
Image Credit: RB Pet Photography, Shutterstock

6. His Food Doesn’t Agree with Him

Sometimes vomiting after eating happens because the food he’s eaten just doesn’t agree with his stomach. If his food has things like dyes, preservatives, and additives in it, he could be throwing up because of these components.

The best way to rule out if his food is causing his vomiting is to educate yourself on how to read and decipher dog food nutrition labels.

7. He Ate His Dog Bone

Many dogs love to chew things like bones and sticks. When they chew on these types of objects, though, some of that bone or wood will get into their digestive system, eventually causing gastrointestinal upset and vomiting.

There are two main factors to consider before you buy him a commercially-made dog bone to ensure he’s getting the healthiest and safest variety. The bone’s ingredients should always be all-natural. You don’t want your dog to gnaw on something that’s made with preservatives or artificial flavoring. The next factor to consider is the bone’s size. You shouldn’t get one that’s either too big or too small for him as bones that are too big can break teeth and ones that are too small can cause choking.

red border collie dog chewing on a bone
Image Credit: Sebastian Quinn, Shutterstock

8. He Has a Health Condition

Several health conditions have vomiting as one of the symptoms. Though these conditions may not happen right after he eats, it is worth having your dog seen by the vet to rule them out.

Some of these conditions include:
  • Pancreatitis
  • Pancreatic tumors
  • Kidney failure
  • Liver failure
  • Bladder obstruction

9. He’s Stressed or Anxious

Stomach aches are common when humans feel stressed or anxious and the same is true with dogs. If you’ve recently adopted your dog, you might see vomiting more often as he becomes accustomed to his new environment. If this is the case, be patient and keep your vet informed about the behaviors you’re seeing. It could just be that being in a new home is stressful and anxiety-inducing and your dog just needs a bit of time to get used to his environment.

sick australian shepherd dog lying on grass
Image Credit: EvitaS, Pixabay


What Should I Do If My Dog Throws Up After Eating?

If your dog throws up one after mealtime and is acting normal and like himself, his vomiting might not be much of a concern. It could be a one-off thing that won’t happen again.

If you notice him throwing up after meals often or if his vomit is bloody and he’s not acting like himself, you should make an appointment with your vet to rule out any serious health conditions.

Your vet will do a physical examination that may or may not include laboratory examinations afterward. He will look at your dog’s heart and respiration levels and check his mouth and abdomen. If he deems it necessary, the vet might also request a complete blood count and chemistry profile to get a better idea of your dog’s overall health.

vet. examining labrador dog
Image Credit: SeventyFour, Shutterstock

How Can I Prevent My Dog from Vomiting After Meals?

You should take your dog to the vet if vomiting after meals becomes a habit so the vet can rule out any potential health conditions. That said, there are some things you can do to try to ensure your dog stays in tip-top shape if you notice he occasionally vomits after eating.

Feed him a well-rounded and nutritious diet. High-quality food will ensure he is getting the nutrients and vitamins he needs to live a healthy life.

Exercise is another essential component of a healthy lifestyle. Daily exercise will help your dog maintain a healthy weight.

Annual visits to the vet are essential in staying healthy and staving off disease.

You might also consider looking at the safety of your yard. Does your dog spend a lot of unsupervised time in your backyard? Are there things back there that he could get into that causes his vomiting, such as unattended garbage?


Final Thoughts

It’s nerve-wracking to see your dog uncomfortable after meals, especially if he’s vomiting. Most of the time, throwing up is the result of something harmless, like a meal eaten too fast. If you’re not sure of the official cause of your dog’s vomiting, you should take them to the vet to ensure there isn’t a serious health condition at play.

Featured Image Credit: Lindsay Helms, Shutterstock

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